#include<sys/types.h>
#include<unistd.h>
#include<stdio.h>
int main(){
	pid_t pid;
	int x=1;
	pid=fork();
	if(pid==0)	
	{
	printf("child:x=%d\n",++x);
	exit(0);
	}
	printf("parent:x=%d\n",--x);
	exit(0);
}
